EDOBE XDOM PMML Manuel d'utilisateur télécharger pdf (Page 77)

virtual double getDouble(long rowNum, int columnNum);

virtual long getLevelNum(long rowNum, long colNum);

virtual const char* getString(long rowNum,

long colNum);

virtual CNKTimeDate getTimeDate(long rowNum,

long colNum);

Returns a single value stored in the CNKBuf at a given row and

column.

rowNum is the row number in the currently-accessible chunk

of data rows: the first row is always accessed with

rowNum==0. rowNum

should be less than

getRowsReady(). columnNum is the column

number for the data, from

0 to CNKBuf::getNumcolumns()-1.

These methods respectively return a value for use as a double, factor,

string, or timeDate.

CNKBufReader::

virtual void getDoubleArray(long firstRowNum,

int columnNum, long numRows, double* ptr);

This method copies multiple values from a column of values stored in

the

CNKBuf into the array *ptr. columnNum identifies the column in

CNKBuf of the data being copied, from 0 to

CNKBuf::getNumcolumns()-1. firstRowNum is the row number of the

first row to copy in the currently-accessible chunk of data rows: it

should be zero or greater.

numRows is the number of values to copy.

firstRowNum + numRows should be less than getRowsReady().

CNKBufReader::

virtual void releaseRows(long numRows);

After reading up to getRowsReady() data rows (using the methods

getDouble, etc.), releaseRows(numRows) is called to release the first

numRows rows of the available rows. A CNKProc may release all of the

getRowsReady() data rows at once, or fewer rows. If fewer rows are

released than were requested, this is a simple way to access a moving

window over the data.

numRows is less than zero, or greater than getRowsReady(), then an

error string is set for the

CNKProc using this CNKBufReader.

CNKBufReader::

virtual void releaseAll();

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EDOBE XDOM PMML Manuel d'utilisateur Page 77